Human Chimp Gorilla only 2% different DNA? 
Author Message
 Human Chimp Gorilla only 2% different DNA?

[Note to moderator: for some reason my provider can't post to
sci.bio.evolution.  Please consider this for posting here.]

I have seen this in many places including some of Steven Jay Gould's
essays:  That there is only 2% difference in the DNA between humans,
chimps, and gorillas.

I'm assuming this is true, but I have no basis for
comparison.  For example, what would be the percentage
difference in DNA btween humans and dogs?  If it's only
2.5% we're not so close to apes.  I expect it's more than that,
but how much?

What would be the percentage difference in DNA between say,
humans and oak trees?  Humans and bacteria?  The average
difference between any two animals?  Any two living things in
general?

Answers from those in the field are appreciated.

--
S. Taibi
Beat your plowshares into swords and your pruning hooks
into spears:  Let the weak say 'I am strong'.  (Joel 3:10)



Wed, 18 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:

>[Note to moderator: for some reason my provider can't post to
>sci.bio.evolution.  Please consider this for posting here.]

>I have seen this in many places including some of Steven Jay Gould's
>essays:  That there is only 2% difference in the DNA between humans,
>chimps, and gorillas.

>I'm assuming this is true, but I have no basis for
>comparison.  For example, what would be the percentage
>difference in DNA btween humans and dogs?  If it's only
>2.5% we're not so close to apes.  I expect it's more than that,
>but how much?

>What would be the percentage difference in DNA between say,
>humans and oak trees?  Humans and bacteria?  The average
>difference between any two animals?  Any two living things in
>general?

>Answers from those in the field are appreciated.

I am not a professional but I have read articles that give some
numbers. As I recall the difference for animals such as cats and
humans is around 20-30%. Perhaps the pros can give a better answer.

This question raises another question in my mind. What is wrong with
the following analysis?

Men have one chromosone that is inherited from their fathers. This is
approximately 2% of the total chromosones that humans have. Thus men
are about as close genetically to chimps as they are to women.

Perhaps the professionals could explain what is wrong with the above
argument.

--
"A shadow is the thing which is generated when you position yourself
 between it and the sun." -- Anonymous

URL http://www.he.tdl.com/~hfanoe/udc.html



Thu, 19 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

: This question raises another question in my mind. What is wrong with
: the following analysis?

It is based on fiction.

: Men have one chromosome that is inherited from their fathers. This is
: approximately 2% of the total chromosomes that humans have. Thus men
: are about as close genetically to chimps as they are to women.

In fact, sons (and daughters) inherit 23 chromosomes from their fathers.
For sons, one of the 23 is the Y chromosome and for daughters, one of the
23 is an X. The other half of our diploid chromosome complement of 46
chromosomes is inherited from our mothers.

Also, the '2%' figure regarding the similarity between chimpanzee and
human genomic DNA means 98% is similar, 2% is different. This number has
been indirectly determined by "CoT" or reassociation kinetics. When actual
homologous genes are compared, the sequences are often essentially
identical. If you wish, I can be more specific regarding this point, and
provide references to the primary literature.

: : Perhaps the professionals could explain what is wrong with the above
: argument.
:

Nothing personal, but I'd hope that most high school graduates would be
able to answer your question.

--Glenn A. Friedrich



Fri, 20 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Goodman 1996 Molecular Phylogenetics and Evolution

Homo and Pan show 99.6% identity in corresponding amooni acid sequence
Gorilla shows 99.3% identiy with either Homo or Pan
Based on 1271 amino acid sequences from 9 protein chains
--
Richard Pocklington,               :Origin of man now proved.-Metaphysics must  
Behavioural Ecology Research Group :flourish.-He who understands baboon would  

                                    Charles Darwin, M notebook 1838



Fri, 20 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:

>>I have seen this in many places including some of Steven Jay Gould's
>>essays:  That there is only 2% difference in the DNA between humans,
>>chimps, and gorillas.
>I am not a professional but I have read articles that give some
>numbers. As I recall the difference for animals such as cats and
>humans is around 20-30%. Perhaps the pros can give a better answer.

>This question raises another question in my mind. What is wrong with
>the following analysis?

>Men have one chromosone that is inherited from their fathers. This is
>approximately 2% of the total chromosones that humans have. Thus men
>are about as close genetically to chimps as they are to women.

>Perhaps the professionals could explain what is wrong with the above
>argument.

When we are talking about 2% difference in DNA between chimps and humans
we mean the difference between gene coding fragments (read: genes), not
the whole genome. So, between men and women the absolute difference is
near 2% but still the genomes are almost identical.

I'm not a proffesional either, but I'm studying these things right now.

Anni



Fri, 20 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:
glenn a. friedrich writes:


>: This question raises another question in my mind. What is wrong with
>: the following analysis?

>It is based on fiction.

>: Men have one chromosome that is inherited from their fathers. This is
>: approximately 2% of the total chromosomes that humans have. Thus men
>: are about as close genetically to chimps as they are to women.

>In fact, sons (and daughters) inherit 23 chromosomes from their fathers.
>For sons, one of the 23 is the Y chromosome and for daughters, one of the
>23 is an X. The other half of our diploid chromosome complement of 46
>chromosomes is inherited from our mothers.

>Also, the '2%' figure regarding the similarity between chimpanzee and
>human genomic DNA means 98% is similar, 2% is different. This number has
>been indirectly determined by "CoT" or reassociation kinetics. When actual
>homologous genes are compared, the sequences are often essentially
>identical. If you wish, I can be more specific regarding this point, and
>provide references to the primary literature.

>: : Perhaps the professionals could explain what is wrong with the above
>: argument.
>:

>Nothing personal, but I'd hope that most high school graduates would be
>able to answer your question.

you misunderstood the question!  foy's question makes sense if you
read it the right way, but you did not read it the right way.  your
condescending attitude seems completely unwarranted in this case, and
perhaps more generally.


Fri, 20 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?



Quote:


>: This question raises another question in my mind. What is wrong with
>: the following analysis?

>It is based on fiction.

That doesn't tell me what is wrong with it.

Quote:

>: Men have one chromosome that is inherited from their fathers. This is
>: approximately 2% of the total chromosomes that humans have. Thus men
>: are about as close genetically to chimps as they are to women.

>In fact, sons (and daughters) inherit 23 chromosomes from their fathers.
>For sons, one of the 23 is the Y chromosome and for daughters, one of the
>23 is an X. The other half of our diploid chromosome complement of 46
>chromosomes is inherited from our mothers.

That doesn't answer my question either. And I was aware of that info.

Quote:

>Also, the '2%' figure regarding the similarity between chimpanzee and
>human genomic DNA means 98% is similar, 2% is different. This number has
>been indirectly determined by "CoT" or reassociation kinetics. When actual
>homologous genes are compared, the sequences are often essentially
>identical. If you wish, I can be more specific regarding this point, and
>provide references to the primary literature.

I am not sure I understand this. Are you saying that a "y" 1/2
chromosone is very similar to a "x" 1/2 chromosone?

Quote:

>: : Perhaps the professionals could explain what is wrong with the above
>: argument.
>:

>Nothing personal, but I'd hope that most high school graduates would be
>able to answer your question.

>--Glenn A. Friedrich

--
"A shadow is the thing which is generated when you position yourself
 between it and the sun." -- Anonymous

URL http://www.he.tdl.com/~hfanoe/udc.html



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:

>glenn a. friedrich writes:

>>: Men have one chromosome that is inherited from their fathers. This is
>>: approximately 2% of the total chromosomes that humans have. Thus men
>>: are about as close genetically to chimps as they are to women.
>>Nothing personal, but I'd hope that most high school graduates would be
>>able to answer your question.
>you misunderstood the question!  foy's question makes sense if you
>read it the right way,

It makes a lot more sense at a party after a couple of beers.
You can get people to laugh at this "scientific" answer to
Henry Higgins' question in "My Fair Lady"
"Oh why can't a woman be more like a man?"

Tom Clarke



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?



: >

: >
: >: Men have one chromosome that is inherited from their fathers. This is
: >: approximately 2% of the total chromosomes that humans have. Thus men
: >: are about as close genetically to chimps as they are to women.
: >
: >
: >In fact, sons (and daughters) inherit 23 chromosomes from their fathers.
: >For sons, one of the 23 is the Y chromosome and for daughters, one of the
: >23 is an X. The other half of our diploid chromosome complement of 46
: >chromosomes is inherited from our mothers.
:
: That doesn't answer my question either. And I was aware of that info.

My apologies for misunderstanding your question.

Superficially, what you say would be correct. However, the differences
between chimpanzee and human genomes would be evenly spaced throughout,
whereas the man/woman differences are due only to heterogametic chromosome
differences. In addition, the human Y chromosome is almost devoid of
genes. What few genes it does contain are within a small region that is
also found on the X chromosome. This allows the XY chromosome pair to
synapse at meiosis and segregate normally during the reductional division.
Also, every cell in the female body (excluding germ cells) have one X
chromosome inactivated. Therefore, the active gene complement in human
males and females are essentially identical (excepting the sex determining
genes found on the Y chromosome, such as SRY).

--Glenn A. Friedrich



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?


Quote:

>glenn a. friedrich writes:


>>: This question raises another question in my mind. What is wrong with
>>: the following analysis?

>>It is based on fiction.

>>: Men have one chromosome that is inherited from their fathers. This is
>>: approximately 2% of the total chromosomes that humans have. Thus men
>>: are about as close genetically to chimps as they are to women.

>>In fact, sons (and daughters) inherit 23 chromosomes from their fathers.
>>For sons, one of the 23 is the Y chromosome and for daughters, one of the
>>23 is an X. The other half of our diploid chromosome complement of 46
>>chromosomes is inherited from our mothers.

>>Also, the '2%' figure regarding the similarity between chimpanzee and
>>human genomic DNA means 98% is similar, 2% is different. This number has
>>been indirectly determined by "CoT" or reassociation kinetics. When actual
>>homologous genes are compared, the sequences are often essentially
>>identical. If you wish, I can be more specific regarding this point, and
>>provide references to the primary literature.

>>: : Perhaps the professionals could explain what is wrong with the above
>>: argument.
>>:

>>Nothing personal, but I'd hope that most high school graduates would be
>>able to answer your question.

>you misunderstood the question!  foy's question makes sense if you
>read it the right way, but you did not read it the right way.  your
>condescending attitude seems completely unwarranted in this case, and
>perhaps more generally.

Thank you for your comments.

Ricahrd Foy
--
"A shadow is the thing which is generated when you position yourself
 between it and the sun." -- Anonymous

URL http://www.he.tdl.com/~hfanoe/udc.html



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?


Quote:

>Goodman 1996 Molecular Phylogenetics and Evolution

>Homo and Pan show 99.6% identity in corresponding amooni acid sequence
>Gorilla shows 99.3% identiy with either Homo or Pan
>Based on 1271 amino acid sequences from 9 protein chains

Thanks for the info.
--
"A shadow is the thing which is generated when you position yourself
 between it and the sun." -- Anonymous

URL http://www.he.tdl.com/~hfanoe/udc.html



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:

> >Men have one chromosone that is inherited from their fathers. This is
> >approximately 2% of the total chromosones that humans have. Thus men
> >are about as close genetically to chimps as they are to women.

It's not a matter of counting chromosomes, but total genes. Many
of the genes that are on the X chromosome are also on the Y
chromosome. Furthermore, human males do have one X chromosome, so
they do in fact possess all the genes (loci) of the human genome.
Some of those genes are present in only one copy, but that is not
what the "2% difference" between humans and chips is about. That
figure refers to actual genes (loci) in one species that correspond
to nothing in the other species.

Still, your thought is intriguing. There are loci on the Y
chromosome that do not match anything on the X chromosome. Can
someone more knowledgeable tell us how many such loci there are?
There is a (small) segment of the total human genome that passes
from father to son, and is not present at all in the bodies of women.
What percentage of the total human genome is that? A fraction of 1%,
I'd wager.

--
===============================================================                  

technical writer/editor   Los Alamos National Laboratory
---------------------------------------------------------------
Telperion Productions     http://www.rt66.com/~telp/
===============================================================



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?

Quote:

>Goodman 1996 Molecular Phylogenetics and Evolution
>Homo and Pan show 99.6% identity in corresponding amooni acid sequence
>Gorilla shows 99.3% identiy with either Homo or Pan
>Based on 1271 amino acid sequences from 9 protein chains

This would imply that the proteins in the bodies of the three species
are more alike than the genetic differences.  How is this possible?

--
S. Taibi
Beat your plowshares into swords and your pruning hooks
into spears:  Let the weak say 'I am strong'.  (Joel 3:10)



Sat, 21 Nov 1998 03:00:00 GMT
 Human Chimp Gorilla only 2% different DNA?



Quote:

>>>I have seen this in many places including some of Steven Jay Gould's
>>>essays:  That there is only 2% difference in the DNA between humans,
>>>chimps, and gorillas.

>>I am not a professional but I have read articles that give some
>>numbers. As I recall the difference for animals such as cats and
>>humans is around 20-30%. Perhaps the pros can give a better answer.

>>This question raises another question in my mind. What is wrong with
>>the following analysis?

>>Men have one chromosone that is inherited from their fathers. This is
>>approximately 2% of the total chromosones that humans have. Thus men
>>are about as close genetically to chimps as they are to women.

>>Perhaps the professionals could explain what is wrong with the above
>>argument.

>When we are talking about 2% difference in DNA between chimps and humans
>we mean the difference between gene coding fragments (read: genes), not
>the whole genome. So, between men and women the absolute difference is
>near 2% but still the genomes are almost identical.

>I'm not a proffesional either, but I'm studying these things right now.

Thanks for your comments. They help me to understand.
--
"Belief gets in the way of learning." --Robert A. Heinlein

URL http://www.he.tdl.com/~hfanoe/index.html



Sun, 22 Nov 1998 03:00:00 GMT
 
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